IS 3400 ( Part 24 ) :2001 ISO 8033:1991 Wwik til'-i* n Clmll (-f?R$rdwJT@?Ril . Indian Standard METHODS OF TEST FOR VULCANIZED PART 24 RUBBER AND PLASTICS HOSE -- DETERMINATION BETWEEN COMPONENTS RUBBERS OF ADHESION ICS 83.080.01 @ 61s 2001 BUREAU MANAK OF 9 INDIAN BAHADUR STANDARDS SHAH ZAFAR MARG BHAVAN, NEW DELHI 110002 May 2001 Price Group 5 Rubber Products Sectional Committee, PCD 13 NATIONAL FOREWORD This Indian Standard ( Part24 ) which is identical with ISO 8033:1991 `Rubber and plastics hose -- Determination of adhesion between components' issued by the International Organization for Standardization ( ISO ) was adopted by the Bureau of Indian Standards on the recommendations of the Rubber Products Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council. This committee decided to completely align it with ISO 8033:1991 and publish as a dual number standard. The text of ISO standard has been proposed to be approved as suitable for publication as Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following: a) Wherever the words `International read as `Indian Standard'. Standard' appear referring to this standard, they should be b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker. In this adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards which are to be substituted in their place are listed below along with their degree of equivalence for the editions indicated. However, that International Standard cross-referred in this adopted ISO standard which has subsequently been revised, position in respe,ct of latest ISO standard has been given: International Standard Corresponding hdian Standard IS 13867 : 1993 Rubber standard temperatures, humidities and times for the conditioning and time interval between vulcanization and testing of test pieces do Degree of Equivalence Technically equivalent ISO 471 :1995 Rubber -- Temperatures, humidities and times for conditioning and testing ISO 1826:1981 Rubber, vulcanized -- Time-interval vulcanization and testing -- Specification Rubber and plastics -- Test equipment -- Tensile, flexural and compression types ( constant rate of traverse ) -- Description ISO 6133:1981 Rubber and plastics -- Analysis of multipeak traces obtained in determinations of tear strength and adhesion strength do ISO 5893:1985 Nil -- Nil -- In the case of ISO 5893:1985 and ISO 6133:1981 the Technical Committee responsible for the preparation of this standard has reviewed their contents and has decided that they are acceptable for use in conjunction with this standard. For tropical countries like India, the standard temperature 27 * 2°C and 65 * 5 percent respectively. and the relative humidity shall be taken as In reporting the results of a test or analysis made in accordance with this standard, if the final value, observed or calculated, is to be rounded off, it shall be done in accordance with IS 2:1960 `Rules for rounding off numerical values ( revised )'. IS 3400( Part 24 ) :2001 ISO 8033:1991 Indian Standard METHODS OF TEST FOR VULCANIZED RUBBERS PART 24 RUBBER AND PLASTICS HOSE -- DETERMINATION OF ADHESION BETWEEN COMPONENTS 1 Scope Adequate adhesion between the various components of a hose is essential if it is to perform satisfactorily in service. This International Standard specifies methods for the determination of the adhesion between lining and reinforcement, between cover and reinforcement and between reinforcement layers. It covers all bore sizes and the following types of hose construction: -- woven textile fabric -- braided yarns -- spiralled yarns -- knitted yarns -- circular woven yarns -- textile cord fabric -- braided wires -- spiralled wires -. hoses containing a supporting helix ISO 471:1983, Rubber ­ Standard temperatures, humidities and times for the conditioning and testing of test pieces. ISO 1826:1981, Rubber, vulcanized -- Time-interval between vulcanization and testing ­ Specification. ISO 5893:1985, Rubber and p/astics ­ Tensile, flexural and compression rate of traverse) -- Description. test equipment types (constant ISO 6133:1981, Rubber and p/astics ­ Ana/ysis of mu/ti-peak traces obtained in determinations of tear strength and adhesion strength. 3 Principle Using test pieces of standard dimensions, the adhesion strength between lining and reinforcement, between cover and reinforcement and between reinforcement Iayers is measured under specified conditions. 4 Apparatus A test machine having the following characteristics is required. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. 4.1 The machine shall be power driven, equipped with a suitable dynamometer, capable of maintaining a substantially constant rate of traverse of the moving head during the test and fitted with an autographic recorder. It shall comply with the requirement for grade A of ISO 5893. NOTE 1 An inertialess dynamometer should be used. 4.2 The grips shall be capable of holding the test piece without slippage. Self-tightening grips are recommended. NOTE 2 1 IS 3400( PaIt24) ISO 8033:1991 :2001 For strip test pieces, provision shali be made to maintain the strip in the appropriate piane of the grips during the test, for exampie by the attachment of sufficient weights to the free end of the test piece or by fitting a supporting plate, coated with a low friction materiai such as polytetrafluoroethylene (PTFE), to the non-driven grip. hoses of the same construction but of different diarneters are not comparable. 5.3 5.3.1 Test piece preparation Type 1 4.3 For testing a ring test piece, a be provided that is a close sliding piece. This mandrel shail be capabie into the driven head of the machine rotate freeiy during the test (type 6). mandrel shall fit in the test of being fitted so that it will Cut a ring 25 mm * 0,5 mm wide from the hose at right angles to its longitudinal axis. Cut the ring transversely and open it out to form a strip (see figure 1). NOTE 3 The test pieces should be prepared by a method that does not cause high temperatures due to the cutting blade. Where heat build-up might cause a deterioration of properties, type 2, 3, 5 or 6 test pieces should be used. 5 5.1 Test pieces Types of test piece 5.3.2 Seven types of test piece are specified to cover the range of hose construction for methods and bore size normally encountered. Type 2 5.1.1 Type 1 R\ng, cut from the hose 25 mm + 0,5 mm wide and cut transversely to form a strip. 5.1.2 Cut the test piece in half longitudinally. From one of the halves make two cuts parallel to the axis of the test piece 25 mm & 0,5 mm, 10 mm i- 0,5 mm or 5 mm + 0,2 mm apart, depending on the width available, taking care not to cut through the yarns. Separate a layer for a distance sufficient to enable the separated ends to be held in the grips of the test machine (see figure 2). 5,3.3 Type 3 from the hose at to its longitudinal axis. Cut the ring and open H to form a strip. Type 2 Strip, 160 mm x haif the hose circumference. 5.1.3 Type 3 Ring, cut from the hose 35 mm i transversely to form a strip. 2 mm wide and cut Cut a ring 35 mm ~ 2 mm wide right angles transversely 5.1.4 Type 4 Strip, 160 mm x haif the hose circumference 10 mm whichever is smaller. 5.1.5 or Make two parallel cuts on the strip 25 mm A 0,5 mm apart, taking care not to cut through the yarns. Separate a layer for a distance sufficient to enable the separated ends to be heid in the grips of the test machine (see tigure 3). 5,3.4 Type 4 Type 5 Strip, 160 mm long x half the hose circumference. 5.1.6 Type 6 Ring, 35 mm * 2 mm wide. 5.1.7 Cut the test piece in half longitudinally. Cut from one of the haives a strip 10 mm & 0,5 mm wide, or of the maximum width obtainable if less than 10 mm. Separate a iayer for a distance sufficient to enable the separated ends to be heid in the grips of the test machine (see figure 4). 5.3.5 Type 5 Type 7 Strip, cut aiong a reinforcing heiix, 25 mm * 0,5 mm wide or the maximum obtainable. 5.2 Test plsce selectlon Uniess specified in the particular product standard or otherwise agreed between the interested parties, the type of test piece shaii be seiected from tabie 1. Resuits obtained with different test pieces and/or Cut the test piece in half longitudinally. Using a twin biaded tooi, cut a centraiiy located longitudinal strip 5 mm ~ 0,2 mm wide through the iining and open up one end of the test piece to form a iip (see figure 5). IS 3400( Part24) ISO 8033:1991 :2001 T=hia ."". - 4 -- . ­­ Tad v-. , damn y,=-- -V. Rakmtinn wbs,". m Hose nominal bore size, d (mm) Hose construction Adhesion between dG20 Textile woven fabric Textile braided Textile knitted Textile circular woven Textile spiral Textile cord fabric @lng and reinforcement Type 2 Type 21) Type 2 Type 52) _3) Type 2 or 6 Type 7 Type 7 Type 7 Type 3 Type 2 or 31) Type 3 Type 5 _3) 2050 Type 1 Type 1 Type f Llnlng and reinforcement Reinforcement layers Cover and reinforcement Type 4 Type 4 Type 4 Type. 1 Type 1 Type 1 Type 3 Type 31) Type 3 Type 5 _3) Reinforcement layers Cover and reinforcement Wire braid Wire spiral Lining and reinforcement Reinforcement layers Cover and reinforcement Type 2 or 6 Type 7 Type 7 Type 7 Type 2 or 6 Type 7 Type 7 Type 7 Hoses containing a supporting helix Llnlng and reinforcement Reinforcement layers Cover and reinforcement 1) If the determination of adhesion Is affected by the difficulty of obtaining a cleanly separating Interface because of fraying of the yarns, Indicate this In the test report. 2) Oetermlnatlon is impracticable below 12,5 mm bore size since Insufficient test piece width Is available. and the result Is In any case significantly 3) Determination Is impracticable since the wire braid or spiral layers tend to disintegrate affected by the forces required to bend the wires. 5.3.6 Type 6 5.5 Time testing Interval between vulcanization and Cut a ring 35 mm + 2 mm wide from the hose at right angles to its longitudinal axis. Make two the cover through circumferential cuts 25 mm ~ 0,5 mm apart and located centrally on the specimen. Make a transverse cut across the 25 mm width through the cover and open up on one side of the cut to form a lip (see figure 6). 5.3.7 For evaluations intended to be comparable the tests should, as far as possible, be carried out after the same time interval after manufacture. ISO 1826 shall be foIlowed for time between sample manufacture and testing. 6 Type 7 Procedure Obtain a strip from the hose wall by cutting along the reinforcing helix and trim to 160 mm long, 25 mm & 0,5 mm wide or the maximum obtainable less than 25 mm (see figure 7). NOTE 4 This is an optional test where helix reinforced hoses are made in long lengths. It does not apply to hoses made to individual lengths, with special enda, built-in fittings, etc. It is only applicable if the spacing between individual helices is greater than 10 mm. 6.1 A separate test piece shall be used for each interface to be tested. 6.2 Take the test piece from the conditioning atmosphere and measure the actual width of the test piece. Fix the separated ends of the test piece in the grips of the testing machine and adjust so that the tension is distributed uniformly and that no twisting of the test piece occurs during the test. Place the test piece in the grips so that the angle of separation is approximately pieces. 5.4 Conditioning of test pieces 180° for strip or 90° for ring test No tests shall be carried out within 24 h of manufacture. Test pieces shall be conditioned at standard temperature and humidity (see ISO 471) before testing for at least 16 h; this maybe part of the 24 h after manufacture. It is important to ensure that the pulling force acts in the plane of separation. 6.3 The rate of travel of the power-driven grip shall be such as to provide a rate of ply separation of 50 mm/min * 5 mm/min. 3 IS 34o9 ( Part 24): 2001 1s0 S033 :1991 6.4 Start the machine and record the force, in newtons, over a length of separation of at least 100 mm or the maximum distance possible if the test piece is less than 100 mm long. If separation occurs at any other point, for example inside either component under test, note this failure and report the force at which it occurs. a) the hose type and nominal bore; b) the date of manufacture reference, as'applicable; and batch number or c) the method of manufacture inforcement; and details of re- d) a reference to this International Standard; 7 Expression of results e) the type(s) of test piece used; f) if appropriate, the adhesion, expressed in kilonewtons per metre of width, between lining and reinforcement; The tracing obtained from the graphical recorder shows the variations in the force at which the plies or layers have separated. Determine the median peak using the appropriate method Divide the median peak force of the test piece and express in kilonewtons per metre. force from the trace specified in ISO 6133. by the effective width the adhesion strength the adhesion, expressed in 9) if appropriate, kilonewtons per metre of width, between layers of reinforcement, noting any difficulties [see footnote 1) to table 1]; h) if appropriate, the adhesion, expressed in kilonewrtons per metre of width, between cover and reinforcement; 8 Test report shall contain the following infor- The test report mation: i) the date of test. Olmenslons In mllllmelres .--. _ ---- Figure 1 - Type 1 test piece 4 IS 3400( Part 24 ) :2001 ISO 8033:1991 Dimensions in millimetres Figure 2 ­ Type 2 test piece 5 IS 3400( Part 24 ) :2001 ISO 8033:1991 Dimensions In millimetres ~.­._, Figure 3 ­ Type 3 test piece 6 IS 3400( Part 24 ): 2001 ISO 8033:1991 Dimensions in millimetres Figure 4 ­ Type 4 test piece 7 IS 3400( Part24) ISO 8033:1991 :2001 Dimensions In milllmetres Figure 5 ­ Type 5 test piece Dimensions in millimetres Ily Figure 6 ­ Type 6 test piece 8 IS 3400( Patt24) :2001 1s0 SOS:1991 Dimensions in mlllimetres Figure 7 ­ Type 7 test piece for hoses containing a supporting helix Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Zndian Standards Act, 1986 to promote harmonious development ofthe activities of standardization marking and quality certification of goods and attending to connected matters in the country. Copyright BIShas the copyrightofallitspublications. Nopartofthesepublicatio~ maybe reproducedin anyfonn without the prior permission in writing of BIS. This does not preclude the&e use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BIS. Review of Indian Standards " Amendments are issued to standards as the needarises onthebasis ofcomments. Standards are also reviewed periodically, a standard along with amendmentsis reaffirmedwhen suchreviewindicates4hat no changes are needed, if the review indicates that chang& are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession ofthe latest amendments or edition by referring to the latest issue of `BIS Catalogue' and `Standards: Monthly Additions'. This Indian Standard has been developedfrom Doc: No. PCD 13 ( 1919 ). 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